对可德兰衍生物--羧甲基可德兰进行疏水改性并考察羧甲基可德兰--脱氧胆酸偶联物(DCMC)的自聚集行为,为进一步将其作为药物载体的研究提供依据.将可德兰羧甲基化以后和脱氧胆酸(DOCA)用酯键相连接,DOCA的取代度用紫外分光光度计测定;DCMC自聚集纳米微粒的形态以透射电镜观察、粒径及粒径分布用动态光散射仪测定、表面电位用ζ电位仪测定;芘荧光法测定DCMC临界聚集浓度.获得DOCA的取代度为2.1%、3.2%、4.1%、6.3%(摩尔分数)的DCMC;自聚集纳米微粒呈球形;在蒸馏水中粒径呈单峰分布,平均粒径为192~347nm,随DOCA的取代度增高而降低,在PBS中平均粒径随pH值的降低而增高;在蒸馏水中ζ电位接近-60mV,然而在PBS中ζ电位绝对值降低,为-26~36mV,且随pH值的降低而降低;在蒸馏水中的临界聚集浓度为0.014~0.052mg/ml,随DOCA的取代度增高而降低,在PBS中的临界聚集浓度比蒸馏水中稍低.用DOCA疏水改性的可德兰衍射物能形成球形的自聚集纳米微粒,该纳米微粒的理化性质受DOCA的取代度、溶剂性质、溶剂pH值的影响.
参考文献
[1] | Gref R;minamitake Y;Peracchia M T et al.[J].Science,1994,263:1600-1603. |
[2] | Kataoka K;Harada A;Nagasaki Y .[J].Advanced Drug Delivery Reviews,2001,47:113-131. |
[3] | Nagasaki Y;Yasugi K;Yamamoto Y et al.[J].Biomacromolecules,2001,2:1067-1070. |
[4] | Mortensen K .[J].Polymers For Advanced Technologies,2001,12(1-2):2-22. |
[5] | Nakanishi T;Fukushima S;Okamoto K et al.[J].Journal of Controlled Release,2001,74:295-302. |
[6] | Can Zhang;Ping Qineng;Hongjuan Zhang .[J].Colloids and Surfaces B:Biointerfaces,2004,39:69-75. |
[7] | Yuan Xubo;Li Hong;Yuan Yanbo .[J].Carbohydrate Polymers,2006,65:337-345. |
[8] | Na Kun;Bae Y H .[J].Pharmaceutical Research,2002,19:681-688. |
[9] | Liu W G;Zhang X;Sun S J et al.[J].Bioconjugate Chemistry,2003,14(04):782-789. |
[10] | Yoshida T;Tasuda Y;Uryu T et al.[J].Macromolecules,1994,27:6272-6276. |
[11] | Greinacher A;Alban S;Dummel V;Franz G;Mueller Eckhardt C .Characterization of the structural requirements for a carbohydrate based anticoagulant with a reduced risk of inducing the immunological type of heparin-associated thrombocytopenia.[J].Thrombosis and Haemostasis: Journal of the International Society on Thrombosis and Haemostasis,1995(3):886-892. |
[12] | Saito H;Yoshioka Y;Uehara N .[J].Carbohydrate Research,1991,217:181-190. |
[13] | Zhang Mei;Peter C K et al.[J].Carbohydrate Polymers,2004,57:319-325. |
[14] | Enhsen A;Kramer W;Wess G .[J].Drug Discovery Today,1998,3:409-418. |
[15] | Na Kun;Patk K H;Kim S W et al.[J].Journal of Controlled Release,2000,69:225-236. |
[16] | Jin Yang;Zhang Hongbin;Yin Yimei et al.[J].Carbohydrate Research,2006,341:90-99. |
[17] | Capitani D;Porro F;Segre A L .[J].Carbohydrate Polymers,2000,42:283-286. |
[18] | Nichifor M;Carpov A .[J].European Polymer Journal,1999,35:2125-2129. |
[19] | Yuan Xubo;Li Hong;Zhu Xiaoxia et al.[J].Journal of Chemical Technology and Biotechnology,2006,81:746-754. |
[20] | Liu Chenguang;Desai K G H;Chen Xiguang et al.[J].Journal of Agricultural and Food Chemistry,2005,53:437-441. |
[21] | Jiang Gangbiao;Quan Daping;Liao Kairong et al.[J].Carbohydrate Polymers,2006,66:514-520. |
[22] | Amiji M M .[J].Carbohydrate Polymers,1995,26:211-213. |
[23] | Dong D C;Winnik M A .[J].Canadian Journal of Chemistry,1984,62:2560-2565. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%